[Remote] Principal Software Engineer - Machine Learning at Fetch

Candidates must have proven experience building and scaling ML infrastructure for personalization, relevance, search, or ad tech systems. Deep hands-on expertise in data infrastructure, distributed systems, and large-scale data pipelines is required, along with experience at a consumer product company with ML models operating at scale. Prior contributions to ranking, personalization, or ad tech systems with measurable business impact are necessary. Strong systems design skills, a track record of leading architecture and communicating design tradeoffs, and experience mentoring other engineers are essential. The role also requires success in leading zero-to-one technical initiatives and the ability to operate in high ambiguity with minimal direction. Familiarity with LLMs, streaming/real-time learning systems, and conversational search or large-scale information retrieval are preferred.